Launcher/Patcher issues - Brand new PC, fresh install.

Im having a lot of trouble the last couple of days, simply trying to get GW2 installed on my new PC, which is barely a couple of days old.

I can download the Launcher just fine, maxed connection speed, 21.7meg and ready to go. Double click the launcher, the patcher starts (229k files or something) and races up to max speed (~850kbps for me) and then after 5-10 seconds, slowly winds all the way back to 0.00kbps. Sometimes it'll climb back to 300, maybe 400 kbps where it sits for a few seconds, and then back to zero. Most times it'll just stop downloading and thats it.

Closing the launcher and opening it back up repeats the process, max speed for a few seconds, then down to nothing.

I cant figure out why.

Steam works just fine, Ive downloaded and installed a few games already, so my internet connection is fine, and I even started the patcher on my fiances after convincing her to let me try it on her new Macbook. It worked just fine.

The only suggestion Ive had so far is to change my DNS settings, which doesnt thrill me, Im worried that will ruin the connection on the whole net work (of which, apart from the Macbook, nothing else is using it).